Latest NTST News:

New Hi-Tech Coatings:

Boron Carbide (B4C)

Silicon Carbide (SiC)

Aluminum Nitride (AlN)

Cubic Boron Nitride (c-BN)

          Hex Boron Nitride (h-BN)

            Silicon Nitride (Si3N4)

Titanium Nitride (TiN)

Fire Prevention

 

 Download the "New Coatings Brochure" for a short description of the above coatings​ or download other specific products at the bottom of this home page

 

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Nevada Thermal Spray Tech.

4842 Judson Avenue, Suite 115

Las Vegas, NV 89115

Thermal spray coatings are

used in over 50 industries

                Silicon Carbide (SiC) Coatings

NTST has developed the unique capability to fabricate pure SiC, SiC cermet (SiC + Si), and SiC-B4C composite  coatings on any substrte material using thermal spray processes.  SiC is extremely difficult to fabricate as a coating due to the tendency to sublime at high temperature.
 
SiC benefits include low density, high strength, low coefficient of thermal expansion, high thermal conductivity, good electrical properties, high decomposition temperature (4530 F), and excellent resistance to corrosion (i.e. alkaline and acidic).  SiC is the third hardest material after diamond and boron carbide making it extremely valuable for wear applications.  SiC materials are used in over 30 industries including the aerospace, automotive, electronics, power, and chemical industries.
 
Carbon composite materials (CCM) are finding more and more applications in industry due to the strength, stiffness, and weight of these materials. They must, however, be protected when in service due to the tendency of CCMs to degrade in alkaline and acidic environments and sunlight.  SiC is an excellent choice for these coating applications due to the unique properties of SiC.
 
SiC coatings can be used for resistance to wear.  Applications include pump seal faces, shaft sleeves, and valves in the chemical, paper, power generation, petrochemical, pharmaceutical, and mining industries.  Due to the high thermal conductivity of SiC, it is an excellent choice for applications requiring substantial thermal shock resistance and refractory heat transfer surfaces.  SiC materials will perform well at high temperatures. 
 
In general, NTST SiC coatings are dense, hard, and wear resistant. Porosity is less than 2%, hardness is 9.2 on the Mohs scale, bond strength exceeds 4000 psia, and surface roughness is 145 microinches. NTST SiC coatings can be deposited on steel, aluminum, graphite, silicon carbide, and carbon composites as illustrated in Figure 1.  Figure 2 illustrates a typical photomicrograph of a SiC coating (400x). Figure 3 illustrates the as-sprayed surface morphology of a typical SiC coating (160x).  Figure 4 illustrates SiC-B4C composite coatings.

Figure 1.  SiC coatings on various substrates

Figure 2.  SiC coating photomicrograph

Figure 3. SiC as-sprayed coating surface morphology (160x)

Figure 4.  SiC-B4C composite coatings.